Change between layers using shortcut in blender 2.8
In the editor type (view Layer) you can press the eye symbol of a collection while holding ctrl to isolate that collection (hide every other collection but that). Sorry I would just comment since I'm not sure that is the answer you where waiting for, but I'm not allowed to do so yet. Hope helps. 

Otherwise, every collection corresponds to a number, so you can cycle through collection by pressing the numbers.